/*
 * Copyright 2008 Georgi Staykov
 * 
 * This file is part of pscoder.
 *
 * pscoder is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * pscoder is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with pscoder.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.gstaykov.pscoder.editor.completion;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceChangeEvent;
import org.eclipse.core.resources.IResourceChangeListener;
import org.eclipse.core.resources.IResourceDelta;
import org.eclipse.core.resources.IResourceDeltaVisitor;
import org.eclipse.core.runtime.CoreException;

import com.gstaykov.pscoder.util.Logger;

public class ResourceChangeListener implements IResourceChangeListener, IResourceDeltaVisitor {

    private static ResourceChangeListener internalVisitor = new ResourceChangeListener();
    private Logger logger = new Logger();
    
    public void resourceChanged(IResourceChangeEvent event) {
        if (event.getType() != IResourceChangeEvent.POST_CHANGE) {
            // We want to process only changes
            return;
        }
        
        try {
            event.getDelta().accept(internalVisitor);
        } catch (CoreException ce) {
            logger.logError("An error has occured while processing resource change", ce);
        }
    }

    public boolean visit(IResourceDelta delta) throws CoreException {
        IResource res = delta.getResource();
        if (res instanceof IFile) {
            CompletionDictionary dict = CompletionDictionary.getInstance(res.getProject().getName());
            dict.loadFileChanges(res.getLocation().toFile());
        }
        
        return true;
    }

}
